Warning: This article contains spoilers for Season 7 of Game of Thrones.

The seventh season of Game of Thrones forced fans to endure some serious logical leaps. Jon Snow seemingly teleported to Dragonstone and Gendry apparently moved at hyperspeed to get an ultra-fast raven to Daenerys. But according to Neil DeGrasse Tyson, who apparently was a little late to catch up to the show at this point, the season’s science wasn’t all bad.